According to a mysterious source on 2ch, the opening theme for the Pandora Hearts anime will be titled Parallel Hearts, and performed by FictionJunction. Its unusual to have FictionJunction without a specific vocalist following, so well have to wait and see what thats all about 
. My hope is that its Yuki singing alone but I dont think thats very likely to happen ^^;. As announced earlier, Yuki Kajiura will also be composing the soundtrack for Pandora Hearts.
Title: Parallel Hearts (Single)
Vocalist: FictionJunction
Catalog Number: VTCL-35065
Release: April 29, 2009
MSRP: 1100 JPY
Thanks to Neo for posting this in the shoutbox, Kazado for posting it in the forum, and Aurelia for providing the source!